13 Jul 2021
 | 13 Jul 2021
Status: a revised version of this preprint is currently under review for the journal ESSD.

Fish and cephalopods monitoring on the Bay of Biscay and Celtic Sea continental shelves

Pascal Laffargue, Damien Delaunay, Vincent Badts, Olivier Berthele, Anne-Sophie Cornou, and François Garren

Abstract. The demersal fish and cephalopod communities of the continental shelves of the Bay of Biscay and the Celtic Sea have been monitored for more than 30 years by the EVHOE series of fisheries surveys. Since 1987, a total of 4247 stations have been sampled in the fall with a GOV bottom trawl in a depth range of 15 to 600 m. The main objective of these surveys is to monitor 22 benthic fish stocks and 10 cephalopods but also to provide a description of the distribution of a total of 250 fish and 50 commercial invertebrate taxa. The dataset ( provides abundance and biomass information by station for all observed taxa. Size distributions for a selection of species are also available. These data are part of a larger set of standardized European surveys that provide essential information for monitoring demersal communities in the Northeast Atlantic. We propose here a critical analysis of the dataset especially in terms of the evolution of the sampling effort and strategy as well as the taxonomic precision.

Pascal Laffargue et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-146', Anonymous Referee #1, 16 Aug 2021
    • AC1: 'Reply on RC1', Pascal Laffargue, 18 Mar 2022
  • RC2: 'Comment on essd-2021-146', Anonymous Referee #2, 15 Sep 2021
    • AC2: 'Reply on RC2', Pascal Laffargue, 18 Mar 2022

Pascal Laffargue et al.

Data sets

Long term benthic community dataset for fish and cephalopods on the continental shelves of the Bay of Biscay and the Celtic Sea P. Laffargue, D. Delaunay, V. Badts, O. Berthele, A. S. Cornou, F. Garren

Pascal Laffargue et al.


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Short summary
The EVHOE fisheries survey has been observing the seabed for over 30 years. The data collected by bottom trawling provides an overview of the biodiversity of fish and cephalopods on the continental shelf of the Bay of Biscay and the Celtic Sea. They allow the monitoring of the abundance of 250 fish taxa and 45 cephalopod taxa in this region of the Northeast Atlantic.